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0d39a3b9 | 1 | ;;; GNU Guix --- Functional package management for GNU |
f75243e1 | 2 | ;;; Copyright © 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org> |
af12790b | 3 | ;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net> |
53f21642 | 4 | ;;; Copyright © 2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org> |
0d39a3b9 LC |
5 | ;;; |
6 | ;;; This file is part of GNU Guix. | |
7 | ;;; | |
8 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
9 | ;;; under the terms of the GNU General Public License as published by | |
10 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
11 | ;;; your option) any later version. | |
12 | ;;; | |
13 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
14 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | ;;; GNU General Public License for more details. | |
17 | ;;; | |
18 | ;;; You should have received a copy of the GNU General Public License | |
19 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
20 | ||
21 | (define-module (guix channels) | |
8ba7fd3c | 22 | #:use-module (git) |
0d39a3b9 | 23 | #:use-module (guix git) |
43badf26 LC |
24 | #:use-module (guix git-authenticate) |
25 | #:use-module ((guix openpgp) | |
26 | #:select (openpgp-public-key-fingerprint | |
27 | openpgp-format-fingerprint)) | |
28 | #:use-module (guix base16) | |
0d39a3b9 LC |
29 | #:use-module (guix records) |
30 | #:use-module (guix gexp) | |
5fbdc9a5 | 31 | #:use-module (guix modules) |
0d39a3b9 LC |
32 | #:use-module (guix discovery) |
33 | #:use-module (guix monads) | |
34 | #:use-module (guix profiles) | |
37c0d458 | 35 | #:use-module (guix packages) |
43badf26 | 36 | #:use-module (guix progress) |
0d39a3b9 | 37 | #:use-module (guix derivations) |
f58f676b | 38 | #:use-module (guix combinators) |
69962ab7 | 39 | #:use-module (guix diagnostics) |
8ba7fd3c | 40 | #:use-module (guix sets) |
0d39a3b9 LC |
41 | #:use-module (guix store) |
42 | #:use-module (guix i18n) | |
43 | #:use-module (srfi srfi-1) | |
af12790b | 44 | #:use-module (srfi srfi-2) |
0d39a3b9 LC |
45 | #:use-module (srfi srfi-9) |
46 | #:use-module (srfi srfi-11) | |
9719e8d3 | 47 | #:use-module (srfi srfi-26) |
ab6025b5 LC |
48 | #:use-module (srfi srfi-34) |
49 | #:use-module (srfi srfi-35) | |
5fbdc9a5 LC |
50 | #:autoload (guix self) (whole-package make-config.scm) |
51 | #:autoload (guix inferior) (gexp->derivation-in-inferior) ;FIXME: circular dep | |
20507347 | 52 | #:autoload (guix quirks) (%quirks %patches applicable-patch? apply-patch) |
43badf26 | 53 | #:use-module (ice-9 format) |
0d39a3b9 | 54 | #:use-module (ice-9 match) |
ed75bdf3 | 55 | #:use-module (ice-9 vlist) |
37c0d458 | 56 | #:use-module ((ice-9 rdelim) #:select (read-string)) |
43badf26 | 57 | #:use-module ((rnrs bytevectors) #:select (bytevector=?)) |
0d39a3b9 LC |
58 | #:export (channel |
59 | channel? | |
60 | channel-name | |
61 | channel-url | |
62 | channel-branch | |
63 | channel-commit | |
43badf26 | 64 | channel-introduction |
0d39a3b9 LC |
65 | channel-location |
66 | ||
43badf26 | 67 | channel-introduction? |
8b7d982e LC |
68 | make-channel-introduction |
69 | channel-introduction-first-signed-commit | |
70 | channel-introduction-first-commit-signer | |
43badf26 | 71 | |
6577682a LC |
72 | openpgp-fingerprint->bytevector |
73 | openpgp-fingerprint | |
74 | ||
0d39a3b9 | 75 | %default-channels |
72f749dc | 76 | guix-channel? |
0d39a3b9 LC |
77 | |
78 | channel-instance? | |
79 | channel-instance-channel | |
80 | channel-instance-commit | |
81 | channel-instance-checkout | |
82 | ||
43badf26 | 83 | authenticate-channel |
0d39a3b9 | 84 | latest-channel-instances |
fe5db4eb | 85 | checkout->channel-instance |
030f1367 | 86 | latest-channel-derivation |
c37f38bd | 87 | channel-instances->manifest |
5fbdc9a5 | 88 | %channel-profile-hooks |
a7c714d3 | 89 | channel-instances->derivation |
872898f7 | 90 | ensure-forward-channel-update |
a7c714d3 | 91 | |
8ba7fd3c LC |
92 | profile-channels |
93 | ||
94 | channel-news-entry? | |
95 | channel-news-entry-commit | |
9719e8d3 | 96 | channel-news-entry-tag |
8ba7fd3c LC |
97 | channel-news-entry-title |
98 | channel-news-entry-body | |
99 | ||
100 | channel-news-for-commit)) | |
0d39a3b9 LC |
101 | |
102 | ;;; Commentary: | |
103 | ;;; | |
104 | ;;; This module implements "channels." A channel is usually a source of | |
105 | ;;; package definitions. There's a special channel, the 'guix' channel, that | |
106 | ;;; provides all of Guix, including its commands and its documentation. | |
107 | ;;; User-defined channels are expected to typically provide a bunch of .scm | |
108 | ;;; files meant to be added to the '%package-search-path'. | |
109 | ;;; | |
110 | ;;; This module provides tools to fetch and update channels from a Git | |
111 | ;;; repository and to build them. | |
112 | ;;; | |
113 | ;;; Code: | |
114 | ||
115 | (define-record-type* <channel> channel make-channel | |
116 | channel? | |
117 | (name channel-name) | |
118 | (url channel-url) | |
119 | (branch channel-branch (default "master")) | |
120 | (commit channel-commit (default #f)) | |
43badf26 | 121 | (introduction channel-introduction (default #f)) |
0d39a3b9 LC |
122 | (location channel-location |
123 | (default (current-source-location)) (innate))) | |
0d39a3b9 | 124 | |
43badf26 LC |
125 | ;; Channel introductions. A "channel introduction" provides a commit/signer |
126 | ;; pair that specifies the first commit of the authentication process as well | |
22a96992 LC |
127 | ;; as its signer's fingerprint. Introductions are used to bootstrap trust in |
128 | ;; a channel. | |
43badf26 | 129 | (define-record-type <channel-introduction> |
22a96992 | 130 | (%make-channel-introduction first-signed-commit first-commit-signer) |
43badf26 | 131 | channel-introduction? |
22a96992 LC |
132 | (first-signed-commit channel-introduction-first-signed-commit) ;hex string |
133 | (first-commit-signer channel-introduction-first-commit-signer)) ;bytevector | |
43badf26 | 134 | |
8b7d982e LC |
135 | (define (make-channel-introduction commit signer) |
136 | "Return a new channel introduction: COMMIT is the introductory where | |
137 | authentication starts, and SIGNER is the OpenPGP fingerprint (a bytevector) of | |
138 | the signer of that commit." | |
22a96992 | 139 | (%make-channel-introduction commit signer)) |
8b7d982e | 140 | |
6577682a LC |
141 | (define (openpgp-fingerprint->bytevector str) |
142 | "Convert STR, an OpenPGP fingerprint (hexadecimal string with whitespace), | |
143 | to the corresponding bytevector." | |
144 | (base16-string->bytevector | |
145 | (string-downcase (string-filter char-set:hex-digit str)))) | |
146 | ||
147 | (define-syntax openpgp-fingerprint | |
148 | (lambda (s) | |
149 | "Convert STR, an OpenPGP fingerprint (hexadecimal string with whitespace), | |
150 | to the corresponding bytevector." | |
151 | (syntax-case s () | |
152 | ((_ str) | |
153 | (string? (syntax->datum #'str)) | |
154 | (openpgp-fingerprint->bytevector (syntax->datum #'str))) | |
155 | ((_ str) | |
156 | #'(openpgp-fingerprint->bytevector str))))) | |
157 | ||
43badf26 LC |
158 | (define %guix-channel-introduction |
159 | ;; Introduction of the official 'guix channel. The chosen commit is the | |
160 | ;; first one that introduces '.guix-authorizations' on the 'staging' | |
161 | ;; branch that was eventually merged in 'master'. Any branch starting | |
162 | ;; before that commit cannot be merged or it will be rejected by 'guix pull' | |
163 | ;; & co. | |
164 | (make-channel-introduction | |
165 | "9edb3f66fd807b096b48283debdcddccfea34bad" ;2020-05-26 | |
6577682a LC |
166 | (openpgp-fingerprint ;mbakke |
167 | "BBB0 2DDF 2CEA F6A8 0D1D E643 A2A0 6DF2 A33A 54FA"))) | |
43badf26 | 168 | |
c3f6f564 LC |
169 | (define %default-channel-url |
170 | ;; URL of the default 'guix' channel. | |
171 | "https://git.savannah.gnu.org/git/guix.git") | |
172 | ||
0d39a3b9 LC |
173 | (define %default-channels |
174 | ;; Default list of channels. | |
175 | (list (channel | |
176 | (name 'guix) | |
37a6cdbf | 177 | (branch "master") |
c3f6f564 | 178 | (url %default-channel-url) |
43badf26 | 179 | (introduction %guix-channel-introduction)))) |
0d39a3b9 LC |
180 | |
181 | (define (guix-channel? channel) | |
182 | "Return true if CHANNEL is the 'guix' channel." | |
183 | (eq? 'guix (channel-name channel))) | |
184 | ||
c3f6f564 LC |
185 | (define (ensure-default-introduction chan) |
186 | "If CHAN represents the \"official\" 'guix' channel and lacks an | |
187 | introduction, add it." | |
188 | (if (and (guix-channel? chan) | |
189 | (not (channel-introduction chan)) | |
190 | (string=? (channel-url chan) %default-channel-url)) | |
191 | (channel (inherit chan) | |
192 | (introduction %guix-channel-introduction)) | |
193 | chan)) | |
194 | ||
0d39a3b9 LC |
195 | (define-record-type <channel-instance> |
196 | (channel-instance channel commit checkout) | |
197 | channel-instance? | |
198 | (channel channel-instance-channel) | |
199 | (commit channel-instance-commit) | |
200 | (checkout channel-instance-checkout)) | |
201 | ||
af12790b | 202 | (define-record-type <channel-metadata> |
4ae762af | 203 | (channel-metadata directory dependencies news-file keyring-reference url) |
af12790b | 204 | channel-metadata? |
ce5d9ec8 | 205 | (directory channel-metadata-directory) ;string with leading slash |
8ba7fd3c | 206 | (dependencies channel-metadata-dependencies) ;list of <channel> |
43badf26 | 207 | (news-file channel-metadata-news-file) ;string | #f |
4ae762af LC |
208 | (keyring-reference channel-metadata-keyring-reference) ;string |
209 | (url channel-metadata-url)) ;string | #f | |
43badf26 LC |
210 | |
211 | (define %default-keyring-reference | |
212 | ;; Default value of the 'keyring-reference' field. | |
213 | "keyring") | |
af12790b | 214 | |
0d39a3b9 LC |
215 | (define (channel-reference channel) |
216 | "Return the \"reference\" for CHANNEL, an sexp suitable for | |
217 | 'latest-repository-commit'." | |
218 | (match (channel-commit channel) | |
219 | (#f `(branch . ,(channel-branch channel))) | |
220 | (commit `(commit . ,(channel-commit channel))))) | |
221 | ||
d774c7b1 LC |
222 | (define sexp->channel-introduction |
223 | (match-lambda | |
224 | (('channel-introduction ('version 0) | |
225 | ('commit commit) ('signer signer) | |
226 | _ ...) | |
227 | (make-channel-introduction commit (openpgp-fingerprint signer))) | |
228 | (x #f))) | |
229 | ||
45b90332 LC |
230 | (define (read-channel-metadata port) |
231 | "Read from PORT channel metadata in the format expected for the | |
232 | '.guix-channel' file. Return a <channel-metadata> record, or raise an error | |
233 | if valid metadata could not be read from PORT." | |
234 | (match (read port) | |
235 | (('channel ('version 0) properties ...) | |
236 | (let ((directory (and=> (assoc-ref properties 'directory) first)) | |
8ba7fd3c | 237 | (dependencies (or (assoc-ref properties 'dependencies) '())) |
43badf26 | 238 | (news-file (and=> (assoc-ref properties 'news-file) first)) |
4ae762af | 239 | (url (and=> (assoc-ref properties 'url) first)) |
43badf26 LC |
240 | (keyring-reference |
241 | (or (and=> (assoc-ref properties 'keyring-reference) first) | |
242 | %default-keyring-reference))) | |
45b90332 | 243 | (channel-metadata |
8ba7fd3c | 244 | (cond ((not directory) "/") ;directory |
ce5d9ec8 LC |
245 | ((string-prefix? "/" directory) directory) |
246 | (else (string-append "/" directory))) | |
8ba7fd3c | 247 | (map (lambda (item) ;dependencies |
45b90332 LC |
248 | (let ((get (lambda* (key #:optional default) |
249 | (or (and=> (assoc-ref item key) first) default)))) | |
250 | (and-let* ((name (get 'name)) | |
251 | (url (get 'url)) | |
252 | (branch (get 'branch "master"))) | |
253 | (channel | |
254 | (name name) | |
255 | (branch branch) | |
256 | (url url) | |
d774c7b1 LC |
257 | (commit (get 'commit)) |
258 | (introduction (and=> (get 'introduction) | |
259 | sexp->channel-introduction)))))) | |
8ba7fd3c | 260 | dependencies) |
43badf26 | 261 | news-file |
4ae762af LC |
262 | keyring-reference |
263 | url))) | |
45b90332 LC |
264 | ((and ('channel ('version version) _ ...) sexp) |
265 | (raise (condition | |
266 | (&message (message "unsupported '.guix-channel' version")) | |
267 | (&error-location | |
268 | (location (source-properties->location | |
269 | (source-properties sexp))))))) | |
270 | (sexp | |
271 | (raise (condition | |
272 | (&message (message "invalid '.guix-channel' file")) | |
273 | (&error-location | |
274 | (location (source-properties->location | |
275 | (source-properties sexp))))))))) | |
276 | ||
53f21642 JN |
277 | (define (read-channel-metadata-from-source source) |
278 | "Return a channel-metadata record read from channel's SOURCE/.guix-channel | |
ce5d9ec8 LC |
279 | description file, or return the default channel-metadata record if that file |
280 | doesn't exist." | |
45b90332 LC |
281 | (catch 'system-error |
282 | (lambda () | |
283 | (call-with-input-file (string-append source "/.guix-channel") | |
284 | read-channel-metadata)) | |
285 | (lambda args | |
286 | (if (= ENOENT (system-error-errno args)) | |
4ae762af | 287 | (channel-metadata "/" '() #f %default-keyring-reference #f) |
45b90332 LC |
288 | (apply throw args))))) |
289 | ||
290 | (define (channel-instance-metadata instance) | |
53f21642 | 291 | "Return a channel-metadata record read from the channel INSTANCE's |
ce5d9ec8 | 292 | description file or its default value." |
53f21642 JN |
293 | (read-channel-metadata-from-source (channel-instance-checkout instance))) |
294 | ||
af12790b RW |
295 | (define (channel-instance-dependencies instance) |
296 | "Return the list of channels that are declared as dependencies for the given | |
297 | channel INSTANCE." | |
ce5d9ec8 | 298 | (channel-metadata-dependencies (channel-instance-metadata instance))) |
af12790b | 299 | |
053b10c3 LC |
300 | (define (apply-patches checkout commit patches) |
301 | "Apply the matching PATCHES to CHECKOUT, modifying files in place. The | |
302 | result is unspecified." | |
303 | (let loop ((patches patches)) | |
304 | (match patches | |
305 | (() #t) | |
20507347 LC |
306 | ((patch rest ...) |
307 | (when (applicable-patch? patch checkout commit) | |
308 | (apply-patch patch checkout)) | |
053b10c3 LC |
309 | (loop rest))))) |
310 | ||
43badf26 LC |
311 | (define commit-short-id |
312 | (compose (cut string-take <> 7) oid->string commit-id)) | |
313 | ||
43badf26 LC |
314 | (define* (authenticate-channel channel checkout commit |
315 | #:key (keyring-reference-prefix "origin/")) | |
316 | "Authenticate the given COMMIT of CHANNEL, available at CHECKOUT, a | |
317 | directory containing a CHANNEL checkout. Raise an error if authentication | |
318 | fails." | |
838f2bdf LC |
319 | (define intro |
320 | (channel-introduction channel)) | |
321 | ||
322 | (define cache-key | |
323 | (string-append "channels/" (symbol->string (channel-name channel)))) | |
324 | ||
325 | (define keyring-reference | |
326 | (channel-metadata-keyring-reference | |
327 | (read-channel-metadata-from-source checkout))) | |
328 | ||
329 | (define (make-reporter start-commit end-commit commits) | |
330 | (format (current-error-port) | |
331 | (G_ "Authenticating channel '~a', commits ~a to ~a (~h new \ | |
332 | commits)...~%") | |
333 | (channel-name channel) | |
334 | (commit-short-id start-commit) | |
335 | (commit-short-id end-commit) | |
336 | (length commits)) | |
337 | ||
338 | (progress-reporter/bar (length commits))) | |
339 | ||
43badf26 LC |
340 | ;; XXX: Too bad we need to re-open CHECKOUT. |
341 | (with-repository checkout repository | |
838f2bdf LC |
342 | (authenticate-repository repository |
343 | (string->oid | |
344 | (channel-introduction-first-signed-commit intro)) | |
345 | (channel-introduction-first-commit-signer intro) | |
346 | #:end (string->oid commit) | |
347 | #:keyring-reference | |
348 | (string-append keyring-reference-prefix | |
349 | keyring-reference) | |
350 | #:make-reporter make-reporter | |
351 | #:cache-key cache-key))) | |
43badf26 | 352 | |
053b10c3 | 353 | (define* (latest-channel-instance store channel |
872898f7 | 354 | #:key (patches %patches) |
5bafc70d | 355 | starting-commit |
a9eeeaa6 | 356 | (authenticate? #f) |
5bafc70d LC |
357 | (validate-pull |
358 | ensure-forward-channel-update)) | |
359 | "Return the latest channel instance for CHANNEL. When STARTING-COMMIT is | |
360 | true, call VALIDATE-PULL with CHANNEL, STARTING-COMMIT, the target commit, and | |
a9eeeaa6 | 361 | their relation. When AUTHENTICATE? is false, CHANNEL is not authenticated." |
053b10c3 LC |
362 | (define (dot-git? file stat) |
363 | (and (string=? (basename file) ".git") | |
364 | (eq? 'directory (stat:type stat)))) | |
365 | ||
c3f6f564 LC |
366 | (let-values (((channel) |
367 | (ensure-default-introduction channel)) | |
368 | ((checkout commit relation) | |
053b10c3 | 369 | (update-cached-checkout (channel-url channel) |
872898f7 LC |
370 | #:ref (channel-reference channel) |
371 | #:starting-commit starting-commit))) | |
5bafc70d LC |
372 | (when relation |
373 | (validate-pull channel starting-commit commit relation)) | |
374 | ||
a9eeeaa6 LC |
375 | (if authenticate? |
376 | (if (channel-introduction channel) | |
377 | (authenticate-channel channel checkout commit) | |
378 | ;; TODO: Warn for all the channels once the authentication interface | |
379 | ;; is public. | |
380 | (when (guix-channel? channel) | |
d51bfe24 LC |
381 | (raise (make-compound-condition |
382 | (formatted-message (G_ "channel '~a' lacks an \ | |
ead5c461 | 383 | introduction and cannot be authenticated~%") |
d51bfe24 LC |
384 | (channel-name channel)) |
385 | (condition | |
386 | (&fix-hint | |
387 | (hint (G_ "Add the missing introduction to your | |
ead5c461 LC |
388 | channels file to address the issue. Alternatively, you can pass |
389 | @option{--disable-authentication}, at the risk of running unauthenticated and | |
d51bfe24 | 390 | thus potentially malicious code.")))))))) |
a9eeeaa6 | 391 | (warning (G_ "channel authentication disabled~%"))) |
43badf26 | 392 | |
053b10c3 LC |
393 | (when (guix-channel? channel) |
394 | ;; Apply the relevant subset of PATCHES directly in CHECKOUT. This is | |
395 | ;; safe to do because 'switch-to-ref' eventually does a hard reset. | |
396 | (apply-patches checkout commit patches)) | |
397 | ||
398 | (let* ((name (url+commit->name (channel-url channel) commit)) | |
399 | (checkout (add-to-store store name #t "sha256" checkout | |
400 | #:select? (negate dot-git?)))) | |
5bafc70d | 401 | (channel-instance channel commit checkout)))) |
872898f7 | 402 | |
5bafc70d | 403 | (define (ensure-forward-channel-update channel start commit relation) |
872898f7 | 404 | "Raise an error if RELATION is not 'ancestor, meaning that START is not an |
5bafc70d | 405 | ancestor of COMMIT, unless CHANNEL specifies a commit. |
872898f7 LC |
406 | |
407 | This procedure implements a channel update policy meant to be used as a | |
408 | #:validate-pull argument." | |
409 | (match relation | |
410 | ('ancestor #t) | |
411 | ('self #t) | |
412 | (_ | |
9744cc7b LC |
413 | (raise (make-compound-condition |
414 | (condition | |
415 | (&message (message | |
416 | (format #f (G_ "\ | |
872898f7 | 417 | aborting update of channel '~a' to commit ~a, which is not a descendant of ~a") |
9744cc7b | 418 | (channel-name channel) |
5bafc70d | 419 | commit start)))) |
872898f7 | 420 | |
9744cc7b LC |
421 | ;; If the user asked for a specific commit, they might want |
422 | ;; that to happen nevertheless, so tell them about the | |
423 | ;; relevant 'guix pull' option. | |
424 | (if (channel-commit channel) | |
425 | (condition | |
426 | (&fix-hint | |
427 | (hint (G_ "Use @option{--allow-downgrades} to force | |
428 | this downgrade.")))) | |
429 | (condition | |
430 | (&fix-hint | |
431 | (hint (G_ "This could indicate that the channel has | |
872898f7 LC |
432 | been tampered with and is trying to force a roll-back, preventing you from |
433 | getting the latest updates. If you think this is not the case, explicitly | |
9744cc7b | 434 | allow non-forward updates.")))))))))) |
872898f7 | 435 | |
4ae762af LC |
436 | (define (channel-instance-primary-url instance) |
437 | "Return the primary URL advertised for INSTANCE, or #f if there is no such | |
438 | information." | |
439 | (channel-metadata-url (channel-instance-metadata instance))) | |
440 | ||
872898f7 LC |
441 | (define* (latest-channel-instances store channels |
442 | #:key | |
443 | (current-channels '()) | |
a9eeeaa6 | 444 | (authenticate? #t) |
872898f7 LC |
445 | (validate-pull |
446 | ensure-forward-channel-update)) | |
0d39a3b9 | 447 | "Return a list of channel instances corresponding to the latest checkouts of |
872898f7 LC |
448 | CHANNELS and the channels on which they depend. |
449 | ||
a9eeeaa6 LC |
450 | When AUTHENTICATE? is true, authenticate the subset of CHANNELS that has a |
451 | \"channel introduction\". | |
452 | ||
872898f7 LC |
453 | CURRENT-CHANNELS is the list of currently used channels. It is compared |
454 | against the newly-fetched instances of CHANNELS, and VALIDATE-PULL is called | |
455 | for each channel update and can choose to emit warnings or raise an error, | |
456 | depending on the policy it implements." | |
af12790b RW |
457 | ;; Only process channels that are unique, or that are more specific than a |
458 | ;; previous channel specification. | |
459 | (define (ignore? channel others) | |
460 | (member channel others | |
461 | (lambda (a b) | |
462 | (and (eq? (channel-name a) (channel-name b)) | |
463 | (or (channel-commit b) | |
464 | (not (or (channel-commit a) | |
465 | (channel-commit b)))))))) | |
f58f676b | 466 | |
872898f7 LC |
467 | (define (current-commit name) |
468 | ;; Return the current commit for channel NAME. | |
469 | (any (lambda (channel) | |
470 | (and (eq? (channel-name channel) name) | |
471 | (channel-commit channel))) | |
472 | current-channels)) | |
473 | ||
9b049de8 LC |
474 | (let loop ((channels channels) |
475 | (previous-channels '())) | |
476 | ;; Accumulate a list of instances. A list of processed channels is also | |
477 | ;; accumulated to decide on duplicate channel specifications. | |
478 | (define-values (resulting-channels instances) | |
479 | (fold2 (lambda (channel previous-channels instances) | |
480 | (if (ignore? channel previous-channels) | |
481 | (values previous-channels instances) | |
482 | (begin | |
483 | (format (current-error-port) | |
484 | (G_ "Updating channel '~a' from Git repository at '~a'...~%") | |
485 | (channel-name channel) | |
486 | (channel-url channel)) | |
5bafc70d LC |
487 | (let* ((current (current-commit (channel-name channel))) |
488 | (instance | |
489 | (latest-channel-instance store channel | |
a9eeeaa6 LC |
490 | #:authenticate? |
491 | authenticate? | |
5bafc70d LC |
492 | #:validate-pull |
493 | validate-pull | |
494 | #:starting-commit | |
495 | current))) | |
4ae762af LC |
496 | (when authenticate? |
497 | ;; CHANNEL is authenticated so we can trust the | |
498 | ;; primary URL advertised in its metadata and warn | |
499 | ;; about possibly stale mirrors. | |
500 | (let ((primary-url (channel-instance-primary-url | |
501 | instance))) | |
502 | (unless (or (not primary-url) | |
503 | (channel-commit channel) | |
504 | (string=? primary-url (channel-url channel))) | |
505 | (warning (G_ "pulled channel '~a' from a mirror \ | |
506 | of ~a, which might be stale~%") | |
507 | (channel-name channel) | |
508 | primary-url)))) | |
872898f7 | 509 | |
9b049de8 LC |
510 | (let-values (((new-instances new-channels) |
511 | (loop (channel-instance-dependencies instance) | |
512 | previous-channels))) | |
513 | (values (append (cons channel new-channels) | |
514 | previous-channels) | |
515 | (append (cons instance new-instances) | |
516 | instances))))))) | |
517 | previous-channels | |
518 | '() ;instances | |
519 | channels)) | |
f58f676b | 520 | |
9b049de8 LC |
521 | (let ((instance-name (compose channel-name channel-instance-channel))) |
522 | ;; Remove all earlier channel specifications if they are followed by a | |
523 | ;; more specific one. | |
524 | (values (delete-duplicates instances | |
525 | (lambda (a b) | |
526 | (eq? (instance-name a) (instance-name b)))) | |
527 | resulting-channels)))) | |
0d39a3b9 | 528 | |
fe5db4eb LC |
529 | (define* (checkout->channel-instance checkout |
530 | #:key commit | |
531 | (url checkout) (name 'guix)) | |
532 | "Return a channel instance for CHECKOUT, which is assumed to be a checkout | |
533 | of COMMIT at URL. Use NAME as the channel name." | |
534 | (let* ((commit (or commit (make-string 40 #\0))) | |
535 | (channel (channel (name name) | |
536 | (commit commit) | |
537 | (url url)))) | |
538 | (channel-instance channel commit checkout))) | |
539 | ||
0d39a3b9 LC |
540 | (define %self-build-file |
541 | ;; The file containing code to build Guix. This serves the same purpose as | |
542 | ;; a makefile, and, similarly, is intended to always keep this name. | |
543 | "build-aux/build-self.scm") | |
544 | ||
545 | (define %pull-version | |
546 | ;; This is the version of the 'guix pull' protocol. It specifies what's | |
547 | ;; expected from %SELF-BUILD-FILE. The initial version ("0") was when we'd | |
548 | ;; place a set of compiled Guile modules in ~/.config/guix/latest. | |
549 | 1) | |
550 | ||
acefa740 LC |
551 | (define (standard-module-derivation name source core dependencies) |
552 | "Return a derivation that builds with CORE, a Guix instance, the Scheme | |
553 | modules in SOURCE and that depend on DEPENDENCIES, a list of lowerable | |
554 | objects. The assumption is that SOURCE contains package modules to be added | |
555 | to '%package-module-path'." | |
acefa740 | 556 | |
53f21642 | 557 | (let* ((metadata (read-channel-metadata-from-source source)) |
ce5d9ec8 | 558 | (directory (channel-metadata-directory metadata))) |
53f21642 JN |
559 | |
560 | (define build | |
561 | ;; This is code that we'll run in CORE, a Guix instance, with its own | |
562 | ;; modules and so on. That way, we make sure these modules are built for | |
563 | ;; the right Guile version, with the right dependencies, and that they get | |
564 | ;; to see the right (gnu packages …) modules. | |
565 | (with-extensions dependencies | |
566 | #~(begin | |
567 | (use-modules (guix build compile) | |
568 | (guix build utils) | |
569 | (srfi srfi-26)) | |
570 | ||
571 | (define go | |
572 | (string-append #$output "/lib/guile/" (effective-version) | |
573 | "/site-ccache")) | |
574 | (define scm | |
575 | (string-append #$output "/share/guile/site/" | |
576 | (effective-version))) | |
acefa740 | 577 | |
ce5d9ec8 | 578 | (let* ((subdir #$directory) |
53f21642 JN |
579 | (source (string-append #$source subdir))) |
580 | (compile-files source go (find-files source "\\.scm$")) | |
581 | (mkdir-p (dirname scm)) | |
582 | (symlink (string-append #$source subdir) scm)) | |
acefa740 | 583 | |
53f21642 | 584 | scm))) |
acefa740 | 585 | |
53f21642 | 586 | (gexp->derivation-in-inferior name build core))) |
0d39a3b9 | 587 | |
37c0d458 LC |
588 | (define* (guile-for-source source #:optional (quirks %quirks)) |
589 | "Return the Guile package to use when building SOURCE or #f if the default | |
590 | '%guile-for-build' should be good enough." | |
591 | (let loop ((quirks quirks)) | |
592 | (match quirks | |
593 | (() | |
594 | #f) | |
595 | (((predicate . guile) rest ...) | |
596 | (if (predicate source) (guile) (loop rest)))))) | |
597 | ||
9db88369 LC |
598 | (define (call-with-guile guile thunk) |
599 | (lambda (store) | |
600 | (values (parameterize ((%guile-for-build | |
601 | (if guile | |
602 | (package-derivation store guile) | |
603 | (%guile-for-build)))) | |
604 | (run-with-store store (thunk))) | |
605 | store))) | |
606 | ||
607 | (define-syntax-rule (with-guile guile exp ...) | |
608 | "Set GUILE as the '%guile-for-build' parameter for the dynamic extent of | |
609 | EXP, a series of monadic expressions." | |
610 | (call-with-guile guile (lambda () | |
611 | (mbegin %store-monad exp ...)))) | |
612 | ||
42a87136 LC |
613 | (define (with-trivial-build-handler mvalue) |
614 | "Run MVALUE, a monadic value, with a \"trivial\" build handler installed | |
615 | that unconditionally resumes the continuation." | |
616 | (lambda (store) | |
617 | (with-build-handler (lambda (continue . _) | |
618 | (continue #t)) | |
619 | (values (run-with-store store mvalue) | |
620 | store)))) | |
621 | ||
0d39a3b9 | 622 | (define* (build-from-source name source |
acefa740 | 623 | #:key core verbose? commit |
0d39a3b9 LC |
624 | (dependencies '())) |
625 | "Return a derivation to build Guix from SOURCE, using the self-build script | |
acefa740 LC |
626 | contained therein; use COMMIT as the version string. When CORE is true, build |
627 | package modules under SOURCE using CORE, an instance of Guix." | |
0d39a3b9 LC |
628 | ;; Running the self-build script makes it easier to update the build |
629 | ;; procedure: the self-build script of the Guix-to-be-installed contains the | |
630 | ;; right dependencies, build procedure, etc., which the Guix-in-use may not | |
631 | ;; be know. | |
632 | (define script | |
633 | (string-append source "/" %self-build-file)) | |
634 | ||
635 | (if (file-exists? script) | |
636 | (let ((build (save-module-excursion | |
637 | (lambda () | |
3a8c4860 LC |
638 | ;; Disable deprecation warnings; it's OK for SCRIPT to |
639 | ;; use deprecated APIs and the user doesn't have to know | |
640 | ;; about it. | |
69962ab7 | 641 | (parameterize ((guix-warning-port |
3a8c4860 | 642 | (%make-void-port "w"))) |
37c0d458 LC |
643 | (primitive-load script))))) |
644 | (guile (guile-for-source source))) | |
0d39a3b9 LC |
645 | ;; BUILD must be a monadic procedure of at least one argument: the |
646 | ;; source tree. | |
647 | ;; | |
648 | ;; Note: BUILD can return #f if it does not support %PULL-VERSION. In | |
649 | ;; the future we'll fall back to a previous version of the protocol | |
650 | ;; when that happens. | |
9db88369 | 651 | (with-guile guile |
42a87136 LC |
652 | ;; BUILD is usually quite costly. Install a "trivial" build handler |
653 | ;; so we don't bounce an outer build-accumulator handler that could | |
654 | ;; cause us to redo half of the BUILD computation several times just | |
655 | ;; to realize it gives the same result. | |
656 | (with-trivial-build-handler | |
657 | (build source #:verbose? verbose? #:version commit | |
658 | #:pull-version %pull-version)))) | |
0d39a3b9 LC |
659 | |
660 | ;; Build a set of modules that extend Guix using the standard method. | |
acefa740 | 661 | (standard-module-derivation name source core dependencies))) |
0d39a3b9 | 662 | |
acefa740 LC |
663 | (define* (build-channel-instance instance |
664 | #:optional core (dependencies '())) | |
0d39a3b9 LC |
665 | "Return, as a monadic value, the derivation for INSTANCE, a channel |
666 | instance. DEPENDENCIES is a list of extensions providing Guile modules that | |
667 | INSTANCE depends on." | |
668 | (build-from-source (symbol->string | |
669 | (channel-name (channel-instance-channel instance))) | |
670 | (channel-instance-checkout instance) | |
671 | #:commit (channel-instance-commit instance) | |
acefa740 | 672 | #:core core |
0d39a3b9 LC |
673 | #:dependencies dependencies)) |
674 | ||
ed75bdf3 LC |
675 | (define (resolve-dependencies instances) |
676 | "Return a procedure that, given one of the elements of INSTANCES, returns | |
677 | list of instances it depends on." | |
678 | (define channel-instance-name | |
679 | (compose channel-name channel-instance-channel)) | |
680 | ||
681 | (define table ;map a name to an instance | |
682 | (fold (lambda (instance table) | |
683 | (vhash-consq (channel-instance-name instance) | |
684 | instance table)) | |
685 | vlist-null | |
686 | instances)) | |
687 | ||
688 | (define edges | |
689 | (fold (lambda (instance edges) | |
690 | (fold (lambda (channel edges) | |
691 | (let ((name (channel-name channel))) | |
692 | (match (vhash-assq name table) | |
693 | ((_ . target) | |
694 | (vhash-consq instance target edges))))) | |
695 | edges | |
696 | (channel-instance-dependencies instance))) | |
697 | vlist-null | |
698 | instances)) | |
699 | ||
700 | (lambda (instance) | |
701 | (vhash-foldq* cons '() instance edges))) | |
702 | ||
0d39a3b9 LC |
703 | (define (channel-instance-derivations instances) |
704 | "Return the list of derivations to build INSTANCES, in the same order as | |
705 | INSTANCES." | |
706 | (define core-instance | |
707 | ;; The 'guix' channel is treated specially: it's an implicit dependency of | |
708 | ;; all the other channels. | |
709 | (find (lambda (instance) | |
710 | (guix-channel? (channel-instance-channel instance))) | |
711 | instances)) | |
712 | ||
ed75bdf3 LC |
713 | (define edges |
714 | (resolve-dependencies instances)) | |
715 | ||
716 | (define (instance->derivation instance) | |
cdf68947 LC |
717 | (mlet %store-monad ((system (current-system))) |
718 | (mcached (if (eq? instance core-instance) | |
719 | (build-channel-instance instance) | |
720 | (mlet %store-monad ((core (instance->derivation core-instance)) | |
721 | (deps (mapm %store-monad instance->derivation | |
722 | (edges instance)))) | |
723 | (build-channel-instance instance core deps))) | |
724 | instance | |
725 | system))) | |
ed75bdf3 | 726 | |
ab6025b5 LC |
727 | (unless core-instance |
728 | (let ((loc (and=> (any (compose channel-location channel-instance-channel) | |
729 | instances) | |
730 | source-properties->location))) | |
731 | (raise (apply make-compound-condition | |
732 | (condition | |
733 | (&message (message "'guix' channel is lacking"))) | |
f75243e1 LC |
734 | (condition |
735 | (&fix-hint (hint (G_ "Make sure your list of channels | |
736 | contains one channel named @code{guix} providing the core of Guix.")))) | |
ab6025b5 LC |
737 | (if loc |
738 | (list (condition (&error-location (location loc)))) | |
739 | '()))))) | |
740 | ||
ed75bdf3 | 741 | (mapm %store-monad instance->derivation instances)) |
0d39a3b9 | 742 | |
0d39a3b9 LC |
743 | (define (whole-package-for-legacy name modules) |
744 | "Return a full-blown Guix package for MODULES, a derivation that builds Guix | |
745 | modules in the old ~/.config/guix/latest style." | |
746 | (define packages | |
747 | (resolve-interface '(gnu packages guile))) | |
748 | ||
49c35bbb LC |
749 | (define modules+compiled |
750 | ;; Since MODULES contains both .scm and .go files at its root, re-bundle | |
751 | ;; it so that it has share/guile/site and lib/guile, which is what | |
752 | ;; 'whole-package' expects. | |
753 | (computed-file (derivation-name modules) | |
754 | (with-imported-modules '((guix build utils)) | |
755 | #~(begin | |
756 | (use-modules (guix build utils)) | |
757 | ||
758 | (define version | |
759 | (effective-version)) | |
760 | (define share | |
761 | (string-append #$output "/share/guile/site")) | |
762 | (define lib | |
763 | (string-append #$output "/lib/guile/" version)) | |
764 | ||
765 | (mkdir-p share) (mkdir-p lib) | |
766 | (symlink #$modules (string-append share "/" version)) | |
767 | (symlink #$modules (string-append lib "/site-ccache")))))) | |
768 | ||
0d39a3b9 LC |
769 | (letrec-syntax ((list (syntax-rules (->) |
770 | ((_) | |
771 | '()) | |
772 | ((_ (module -> variable) rest ...) | |
773 | (cons (module-ref (resolve-interface | |
774 | '(gnu packages module)) | |
775 | 'variable) | |
776 | (list rest ...))) | |
777 | ((_ variable rest ...) | |
778 | (cons (module-ref packages 'variable) | |
779 | (list rest ...)))))) | |
49c35bbb | 780 | (whole-package name modules+compiled |
0d39a3b9 LC |
781 | |
782 | ;; In the "old style", %SELF-BUILD-FILE would simply return a | |
783 | ;; derivation that builds modules. We have to infer what the | |
784 | ;; dependencies of these modules were. | |
b74ed909 | 785 | (list guile-json-3 guile-git guile-bytestructures |
0d39a3b9 LC |
786 | (ssh -> guile-ssh) (tls -> gnutls))))) |
787 | ||
788 | (define (old-style-guix? drv) | |
789 | "Return true if DRV corresponds to a ~/.config/guix/latest style of | |
790 | derivation." | |
791 | ;; Here we rely on a gross historical fact: that derivations produced by the | |
792 | ;; "old style" (before commit 8a0d9bc8a3f153159d9e239a151c0fa98f1e12d8, | |
793 | ;; dated May 30, 2018) did not depend on "guix-command.drv". | |
794 | (not (find (lambda (input) | |
9af75a26 LC |
795 | (string=? "guix-command" |
796 | (derivation-name | |
797 | (derivation-input-derivation input)))) | |
0d39a3b9 LC |
798 | (derivation-inputs drv)))) |
799 | ||
800 | (define (channel-instances->manifest instances) | |
801 | "Return a profile manifest with entries for all of INSTANCES, a list of | |
802 | channel instances." | |
d9e6217f | 803 | (define (instance->entry instance drv) |
471550c2 LC |
804 | (let* ((commit (channel-instance-commit instance)) |
805 | (channel (channel-instance-channel instance)) | |
806 | (intro (channel-introduction channel))) | |
d9e6217f LC |
807 | (manifest-entry |
808 | (name (symbol->string (channel-name channel))) | |
809 | (version (string-take commit 7)) | |
810 | (item (if (guix-channel? channel) | |
811 | (if (old-style-guix? drv) | |
812 | (whole-package-for-legacy (string-append name "-" version) | |
813 | drv) | |
814 | drv) | |
815 | drv)) | |
816 | (properties | |
817 | `((source (repository | |
818 | (version 0) | |
819 | (url ,(channel-url channel)) | |
820 | (branch ,(channel-branch channel)) | |
471550c2 LC |
821 | (commit ,commit) |
822 | ,@(if intro | |
823 | `((introduction | |
824 | (channel-introduction | |
825 | (version 0) | |
826 | (commit | |
827 | ,(channel-introduction-first-signed-commit | |
828 | intro)) | |
829 | (signer | |
830 | ,(openpgp-format-fingerprint | |
831 | (channel-introduction-first-commit-signer | |
832 | intro)))))) | |
833 | '())))))))) | |
0d39a3b9 LC |
834 | |
835 | (mlet* %store-monad ((derivations (channel-instance-derivations instances)) | |
d9e6217f | 836 | (entries -> (map instance->entry instances derivations))) |
0d39a3b9 | 837 | (return (manifest entries)))) |
030f1367 | 838 | |
5fbdc9a5 LC |
839 | (define (package-cache-file manifest) |
840 | "Build a package cache file for the instance in MANIFEST. This is meant to | |
841 | be used as a profile hook." | |
ccbc427f | 842 | (let ((profile (profile (content manifest) (hooks '())))) |
5fbdc9a5 LC |
843 | (define build |
844 | #~(begin | |
845 | (use-modules (gnu packages)) | |
846 | ||
847 | (if (defined? 'generate-package-cache) | |
848 | (begin | |
849 | ;; Delegate package cache generation to the inferior. | |
850 | (format (current-error-port) | |
851 | "Generating package cache for '~a'...~%" | |
852 | #$profile) | |
853 | (generate-package-cache #$output)) | |
854 | (mkdir #$output)))) | |
855 | ||
856 | (gexp->derivation-in-inferior "guix-package-cache" build | |
857 | profile | |
4035fcba LC |
858 | |
859 | ;; If the Guix in PROFILE is too old and | |
860 | ;; lacks 'guix repl', don't build the cache | |
861 | ;; instead of failing. | |
862 | #:silent-failure? #t | |
863 | ||
5fbdc9a5 | 864 | #:properties '((type . profile-hook) |
f674bc66 LC |
865 | (hook . package-cache)) |
866 | #:local-build? #t))) | |
5fbdc9a5 LC |
867 | |
868 | (define %channel-profile-hooks | |
869 | ;; The default channel profile hooks. | |
870 | (cons package-cache-file %default-profile-hooks)) | |
871 | ||
c37f38bd LC |
872 | (define (channel-instances->derivation instances) |
873 | "Return the derivation of the profile containing INSTANCES, a list of | |
874 | channel instances." | |
875 | (mlet %store-monad ((manifest (channel-instances->manifest instances))) | |
5fbdc9a5 LC |
876 | (profile-derivation manifest |
877 | #:hooks %channel-profile-hooks))) | |
c37f38bd | 878 | |
030f1367 LC |
879 | (define latest-channel-instances* |
880 | (store-lift latest-channel-instances)) | |
881 | ||
872898f7 LC |
882 | (define* (latest-channel-derivation #:optional (channels %default-channels) |
883 | #:key | |
884 | (current-channels '()) | |
885 | (validate-pull | |
886 | ensure-forward-channel-update)) | |
030f1367 | 887 | "Return as a monadic value the derivation that builds the profile for the |
872898f7 LC |
888 | latest instances of CHANNELS. CURRENT-CHANNELS and VALIDATE-PULL are passed |
889 | to 'latest-channel-instances'." | |
890 | (mlet %store-monad ((instances | |
891 | (latest-channel-instances* channels | |
892 | #:current-channels | |
893 | current-channels | |
894 | #:validate-pull | |
895 | validate-pull))) | |
c37f38bd | 896 | (channel-instances->derivation instances))) |
a7c714d3 LC |
897 | |
898 | (define (profile-channels profile) | |
899 | "Return the list of channels corresponding to entries in PROFILE. If | |
900 | PROFILE is not a profile created by 'guix pull', return the empty list." | |
901 | (filter-map (lambda (entry) | |
902 | (match (assq 'source (manifest-entry-properties entry)) | |
903 | (('source ('repository ('version 0) | |
904 | ('url url) | |
905 | ('branch branch) | |
906 | ('commit commit) | |
471550c2 | 907 | rest ...)) |
a7c714d3 LC |
908 | (channel (name (string->symbol |
909 | (manifest-entry-name entry))) | |
910 | (url url) | |
471550c2 LC |
911 | (commit commit) |
912 | (introduction | |
913 | (match (assq 'introduction rest) | |
914 | (#f #f) | |
915 | (('introduction intro) | |
916 | (sexp->channel-introduction intro)))))) | |
a7c714d3 LC |
917 | |
918 | ;; No channel information for this manifest entry. | |
919 | ;; XXX: Pre-0.15.0 Guix did not provide that information, | |
920 | ;; but there's not much we can do in that case. | |
921 | (_ #f))) | |
922 | ||
923 | ;; Show most recently installed packages last. | |
924 | (reverse | |
925 | (manifest-entries (profile-manifest profile))))) | |
8ba7fd3c LC |
926 | |
927 | \f | |
928 | ;;; | |
929 | ;;; News. | |
930 | ;;; | |
931 | ||
932 | ;; Channel news. | |
933 | (define-record-type <channel-news> | |
934 | (channel-news entries) | |
935 | channel-news? | |
936 | (entries channel-news-entries)) ;list of <channel-news-entry> | |
937 | ||
938 | ;; News entry, associated with a specific commit of the channel. | |
939 | (define-record-type <channel-news-entry> | |
9719e8d3 | 940 | (channel-news-entry commit tag title body) |
8ba7fd3c | 941 | channel-news-entry? |
9719e8d3 LC |
942 | (commit channel-news-entry-commit) ;hex string | #f |
943 | (tag channel-news-entry-tag) ;#f | string | |
8ba7fd3c LC |
944 | (title channel-news-entry-title) ;list of language tag/string pairs |
945 | (body channel-news-entry-body)) ;list of language tag/string pairs | |
946 | ||
947 | (define (sexp->channel-news-entry entry) | |
948 | "Return the <channel-news-entry> record corresponding to ENTRY, an sexp." | |
949 | (define (pair language message) | |
950 | (cons (symbol->string language) message)) | |
951 | ||
952 | (match entry | |
9719e8d3 | 953 | (('entry ((and (or 'commit 'tag) type) commit-or-tag) |
8ba7fd3c LC |
954 | ('title ((? symbol? title-tags) (? string? titles)) ...) |
955 | ('body ((? symbol? body-tags) (? string? bodies)) ...) | |
956 | _ ...) | |
9719e8d3 LC |
957 | (channel-news-entry (and (eq? type 'commit) commit-or-tag) |
958 | (and (eq? type 'tag) commit-or-tag) | |
8ba7fd3c LC |
959 | (map pair title-tags titles) |
960 | (map pair body-tags bodies))) | |
961 | (_ | |
962 | (raise (condition | |
963 | (&message (message "invalid channel news entry")) | |
964 | (&error-location | |
965 | (location (source-properties->location | |
966 | (source-properties entry))))))))) | |
967 | ||
968 | (define (read-channel-news port) | |
969 | "Read a channel news feed from PORT and return it as a <channel-news> | |
970 | record." | |
971 | (match (false-if-exception (read port)) | |
972 | (('channel-news ('version 0) entries ...) | |
973 | (channel-news (map sexp->channel-news-entry entries))) | |
974 | (('channel-news ('version version) _ ...) | |
975 | ;; This is an unsupported version from the future. There's nothing wrong | |
976 | ;; with that (the user may simply need to upgrade the 'guix' channel to | |
977 | ;; be able to read it), so silently ignore it. | |
978 | (channel-news '())) | |
979 | (#f | |
980 | (raise (condition | |
981 | (&message (message "syntactically invalid channel news file"))))) | |
982 | (sexp | |
983 | (raise (condition | |
984 | (&message (message "invalid channel news file")) | |
985 | (&error-location | |
986 | (location (source-properties->location | |
987 | (source-properties sexp))))))))) | |
988 | ||
9719e8d3 LC |
989 | (define (resolve-channel-news-entry-tag repository entry) |
990 | "If ENTRY has its 'commit' field set, return ENTRY. Otherwise, lookup | |
991 | ENTRY's 'tag' in REPOSITORY and return ENTRY with its 'commit' field set to | |
992 | the field its 'tag' refers to. A 'git-error' exception is raised if the tag | |
993 | cannot be found." | |
994 | (if (channel-news-entry-commit entry) | |
995 | entry | |
996 | (let* ((tag (channel-news-entry-tag entry)) | |
997 | (reference (string-append "refs/tags/" tag)) | |
998 | (oid (reference-name->oid repository reference))) | |
999 | (channel-news-entry (oid->string oid) tag | |
1000 | (channel-news-entry-title entry) | |
1001 | (channel-news-entry-body entry))))) | |
1002 | ||
8ba7fd3c LC |
1003 | (define* (channel-news-for-commit channel new #:optional old) |
1004 | "Return a list of <channel-news-entry> for CHANNEL between commits OLD and | |
1005 | NEW. When OLD is omitted or is #f, return all the news entries of CHANNEL." | |
1006 | (catch 'git-error | |
1007 | (lambda () | |
1008 | (let* ((checkout (update-cached-checkout (channel-url channel) | |
1009 | #:ref `(commit . ,new))) | |
1010 | (metadata (read-channel-metadata-from-source checkout)) | |
1011 | (news-file (channel-metadata-news-file metadata)) | |
1012 | (news-file (and news-file | |
1013 | (string-append checkout "/" news-file)))) | |
1014 | (if (and news-file (file-exists? news-file)) | |
9719e8d3 LC |
1015 | (with-repository checkout repository |
1016 | (let* ((news (call-with-input-file news-file | |
1017 | read-channel-news)) | |
1018 | (entries (map (lambda (entry) | |
1019 | (resolve-channel-news-entry-tag repository | |
1020 | entry)) | |
1021 | (channel-news-entries news)))) | |
1022 | (if old | |
8ba7fd3c LC |
1023 | (let* ((new (commit-lookup repository (string->oid new))) |
1024 | (old (commit-lookup repository (string->oid old))) | |
1025 | (commits (list->set | |
1026 | (map (compose oid->string commit-id) | |
1027 | (commit-difference new old))))) | |
1028 | (filter (lambda (entry) | |
1029 | (set-contains? commits | |
1030 | (channel-news-entry-commit entry))) | |
9719e8d3 LC |
1031 | entries)) |
1032 | entries))) | |
8ba7fd3c LC |
1033 | '()))) |
1034 | (lambda (key error . rest) | |
1035 | ;; If commit NEW or commit OLD cannot be found, then something must be | |
1036 | ;; wrong (for example, the history of CHANNEL was rewritten and these | |
1037 | ;; commits no longer exist upstream), so quietly return the empty list. | |
1038 | (if (= GIT_ENOTFOUND (git-error-code error)) | |
1039 | '() | |
1040 | (apply throw key error rest))))) | |
9db88369 LC |
1041 | |
1042 | ;;; Local Variables: | |
1043 | ;;; eval: (put 'with-guile 'scheme-indent-function 1) | |
1044 | ;;; End: |